Geavel-scbeeu



F. H. BEACH.`

GRAvEL SCREEN.

tfAPP'LlcATloN FILED Ams. 191s.

Patented July 22, 1919.

F. H. BEACH. GHAV'EL SCREEN. APPLICATIO FILED APR. 6., 1918. 1,3 10,645. Patented July 22, 1919.

4 sHEETs s"HfET 2.

trof. "man F. H. BEACH.

GRAVEL SCREEN.

,l APPLICATION FILED APR.6, IsI.

. ,31 0,645.- Patented July 22, 1919.

4 SHEETS-SHEET 3.

F. H. BEACH.

GRAVEL SCREEN.

APPLICATION FILED APR. 6. |918.

1 ,310,645 Patented July 22, 1919.

4 SHEETS*SHEET 4.

NETE@ STATES PATENT OFFE.

FITCH H. BEACH, 40F CHARLOTTE, MICHIGAN.

GHAvEL-SCREEN.

iiocis.v

Specication of Letters Patent. A Patented July 22, 1919.

Application filed April 6, 1918. Serial No. 227,095.

To all whom t may concern.'

Be it kno-wn that I, FITCH H. BEACH, a citizen of the United States, residing at Charlotte, in the county of Eaton and State of Michigan, have invented a new and useful Gravel-Screen, of which the following 1s a speciiication. i

This invention relates to screens particularly designed for screening gravel, one of the objects of the invention being to provide a screen, especially designed for screenlng gravel, which will automatically knock ofi any material which mayy adhere t0 the members of the screen, it thus being possible to keep the screen clear at all times so that it will be maintained as an efcient separating means for the material gravitating there over. 1

Another obj ect is to provide ascree'n made up of an endless series of perforated plates which rest one upon the other in substantial alinement to form the upper flight of the screen and, while in this position, tr. vel upwardly under i the material gravitating downwardly thereon,V the plates being brought successively to the upper' end of the screen where they are turned over and caused to strike a bumper, thus to forcibly eject or release any vmaterial adhering to the plates. y

With the foregoing and other objects in viewV which will appear as the description of the invention proceeds, the invention consists ofcertain novel details of construction and combinations of parts which will be hereinafter more fully described and pointed outv in the claims,it being understood that various changes may be made wi-thin the scope of the appended claims without departing from the spirit of the invention.

1n the accompanying drawings the preferred form of the invention has been shown.

` In said drawings- Figure 1-isV a side elevation ofa gravel screening apparatus having the present improvements combined therewith.

Fig. 2 is an enlarged view, partly inside elevation and partly in section, of. a portion of the screen structure. p i

Fig. 3l is a plan view of Va portion ofthe screen.

Fig. 4L is a'bottom plan view of a portion of one of the screen plates andone of its chains.

Fig. 5 is a transverse section through a portion of the screen on the l-ine 5-5, Fig. 2.

Fig. 6 is a transverse section through a portion of a modified form of screen.

Fig. 7 is a section on line 7 7, Fig. G.

Fig. 8 is a side elevation of a modified form of screening apparatus.

Referring to the figures .by characters o reference, V1 designates a portable, wheel supported structure preferably subdivided into a number of bins indicated generally at 2 and upstanding from one end of this structure is a supporting frame on the upper portion of which is journaled a shaft 3, the said frame being indicated at 4:. Pivotally mounted on the shaft and extending downwardly therefrom is an elevator frame 5 for holding a suitable elevator 6 which can be operated in any suitable manner. For examiple, and as shown in Fig. 1, the power shaft 7 may drive chain and sprocket mechan-.ism indicated generally at S and thus rotate the shaft 9 and additional chain and sprocket mechanism 10 can be einployed for transmitting motion from shaft 7 to a shaft 11. This shaft has a sprocket 12 which transmits motion through a chain 13 to a sprocket 14 secured to the shaft 3. An inclined coarse screen or riddle 15 extends over thestructure 3 and is adapted to receive the material discharged from the elevator and to allow coarse chunks of material to gravitate therealong and be discharged from the machine.

interposed between the riddle 15 and the tops `of all but the last or end bin 2, is the screen constituting the present invention. Inclined angle members 17 are secured at their ends to the frame 4: and to the top of thestructure and extending inwardly from these members are brackets 1S to which are attached channeled side beams 19. Bearings 20 are connected to the members 17 adjacent the ends thereof and journaled therein are transverse shafts 21. Additional bearings 22 are provided on the channeled beams 19 and secured to the shafts and located between the angle members 17 and the side beams 19 are sprockets 23 on which are mounted endless chains 24 which extend throughout the length of the screen. Certain of the pintles of the chains are removed andthe end portions of rods 25 are substituted therefor, these rods serving to connect the chains and being parallel.

Journaled on each of the rods 25 are bearings 26 secured to the side portions of screen plates 27 at one end and these plates are wide enough to extend over the beams 1Q shoes adapted to slide upon. the Vbeams 19,A

these shoes being shown at 28.

Secured to and depending from the upper portions of the members 17 are hangers 29 and the lower ends of these hangers are connected by a transverse bumper rod 30.

A sprocket 31 is secured to the projecting end of the lower shaft 21 of the screen and receives motion through a chain 32, from a sprocket 33 secured to a shaft 34. This shaft, in turn, receives motion through a sprocket 35 and chain 36, from a sprocket 37 secured to the shaft 7.

In using the apparatus the drive mechanism is set in motion and the elevated material will be directed onto the riddle 15. Coarse material will be discharged from one end of the riddle while the desirable matoria-l will pass through the riddle and fall onto the screen thereunder. As the screen is operated, the plates 27 will be brought successively into position to form the substantially fiat screen made up of the lapping plates of the upper flight of the screen. Thus while this upper flight is moving up wardly the material is gravitating downwardly thereover and being directed into the several bins provided therefor. Some of the material is likely to become wedged in the apertures in the plates 27 and clay or the like will sometimes adhere to the plates. In cold weather the gravel, if wet, is likely to freeze upon the plates. These adhering materials, however, are all removed from the plates automatically because as each plate reaches its uppermost position, it will swing downwardly about the upper shaft 21 and strike forcibly upon the bumper rod 30 with the result that the material will be jarred off of the plate. The plates will hang vertically after leaving the bumper rod and until they reach the lower shaft 21 whereupon they will reassume their lapped relation and again travel upwardly.

Instead of mounting the screen plates on the chainsV in the manner hereinbefore' described certain of the links of the chains may be provided with lugs 3S and straps 39 may be secured on the lugs. The ends of the Astraps are extended at right angles to form ears 40 and transverse rods 41 are secured to the ears. rllhese rods serve to support the pivotcd screen plates 272 Obviously the form of screening apparatus can be varied at will and instead Copies of this patent may he obtained for of arranging the screen between the bins and a riddle thereover, as hereinbefore described, an arrangement such as shown in Fig. 8y may be utilized. In this form of apparatus an elevator 42 directs material into a hopper 43 at the top of the screen 44 constituting the present invention and another elevator receives the tailings from said screen and elevates them to the bin 45, this second elevator being shown at 46. The screenings will be piled on the ground, as shown.

To facilitate the operation of the screen sprockets 31 are secured to theend portions of the shafts 21 and are connected by an endless drive chain 32.

wWhile the apparatus is especially designec for use in screening gravel, it can also be used to advantage in removing trash from streams of water, the water iowing through the ascending screen plates while the trash is carried up by `the'plates.

What is claimed is 1. -A screen including inclined side beams, endless chains supported adjacent thereto, and beyond the sides thereof, parallel rods connecting the chains and constituting pivotal connections between certain of the links thereof, screen plates each having a bearing mounted on one of the rods, said plates being extended laterally beyond the chains and over the beams and being adapted to lap when moving upwardly with the chains, each plate having slots therein eX- tending longitudinally of the screen, and a bumper below the chains and adjacent the upper portions thereof, each plate being adapted to swing through approximately 270 into violent contact with the bumper.

2. The combination with inclined beams, of endless chains supported beyond the sides of the beams, parallel rods connecting the chains and extending across the beams, each rod constituting a pivotal connection between certain of the links of the chain, plates having bearings mounted on the rods, said plates lapping the beams but inter- .posed between the chains, said plates being adapted to lap along Vtheir upper and lower edges while moving `upwardly along the beams, there being slots in each plate extending longitudinally of the screen, Vand friction reducing meansV upon each plate and including spring strips bowed from end to end and bearing at their centers upon the beams during the upward movement of the plates.

In testimony that I claim the foregoing as my own, .I have hereto affixed `my signature.

- FITCH H. BEACH.

ve cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

